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inorganic compounds
Comparison of the isotypic solid-state structures of disodium zinc diphosphate (Na2ZnP2O7) and disodium zinc diphosphate doped with europium (Na1.94Eu0.02ZnP2O7) shows the europium to share a sodium site and to exist at the intersection of two mirror planes in the layer-like structure. The emission characteristics of this rare earth containing material are reported.